Can you tell me---yesterday A.what they doB.what they do C.what do they doD.what did they do

Can you tell me---yesterday A.what they doB.what they do C.what do they doD.what did they do

题目
Can you tell me---yesterday A.what they doB.what they do C.what do they doD.what did they do
答案
yesterday,昨天,所以是过去式,
从句,要用陈述语序,
没有正确选项
应该是What they did
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